Crossed-beam scattering of F+CD4→DF+CD3(νNK):: The integral cross sections

The title reaction was investigated in a crossed-beam experiment. A (2+1) resonance-enhanced multiphon ionization technique was used to interrogate the internal-state distributions of the CD3 product at three different collision energies. Only the nu(2) (umbrella) mode excitation was observed. Its distribution changes from a monotonically declined distribution at low energy to a slightly inverted one at higher collision energy. Although the rotational excitations of CD3 were small, a strong preference for K=0 was found, indicative of the dominance of the tumbling rotation motion of the CD3 product. The vibration-resolved excitation functions were also measured for nu(2)=0-3. A reaction barrier of 0.5 kcal/mol was deduced. (C) 2003 American Institute of Physics.